diff -ur a/js/package.json b/js/package.json
--- a/js/package.json	2025-05-21 19:20:26.000000000 +0200
+++ b/js/package.json	2025-08-21 18:56:06.584707667 +0200
@@ -35,7 +35,7 @@
   "devDependencies": {
     "@jupyter-widgets/base-manager": "^1.0.0",
     "@jupyter-widgets/controls": "^5",
-    "@jupyterlab/builder": "^3.0.0",
+    "@jupyterlab/builder": "^4.0.0",
     "@types/chai": "^4.1.7",
     "@types/d3": "^5.7.2",
     "@types/expect.js": "^0.3.29",
@@ -103,5 +103,9 @@
     "css/",
     "lib/",
     "shaders/"
-  ]
+  ],
+  "resolutions": {
+    "cipher-base": "1.0.6",
+    "sha.js": "2.4.12"
+  }
 }